نتایج جستجو برای: mining faces
تعداد نتایج: 127201 فیلتر نتایج به سال:
Cameroon has a strong geological potential for a number of mineral resources that, if well managed, could support economic growth. The country contains potentially large deposits of iron ore, gold, bauxite, diamond, limestone, nickel, and gemstones, and indices of other numerous minerals and precious metals. Despite its geological wealth, mining has never played a major role in Cameroon’s econo...
In this paper, the authors address issue of large solid waste output and surface subsidence in western coal base. They focus on 110904 filling working face Renjiazhuang Mine employ a combination theoretical analysis, numerical simulation, field practice to analyze limit caving step cycle pressure face. The propose mining-filling coordination scheme called “three mining one charging”. Through th...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید